Help Needed with backport Broadcom Chip Driver Issues on Jetson Nano

Hello everyone,

I’m reaching out for assistance with some challenges I’m encountering on jetson nano. These challenges include issues with wireless configuration, a Broadcom wifi chip driver, and particularly a kernel backport to version 4.9. Below is the detailed error log, highlighting problems with loading X.509 certificates for the regulatory database, a driver compatibility issue with a Broadcom chip (BCM57005/42), and complications arising from backporting modules.

First, the log entries related to the regulatory database and X.509 certificates issue:

[1180.790684] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[1180.800712] cfg80211: Problem loading in-kernel X.509 certificate (-129)
[1180.813639] cfg80211: loaded regulatory.db is malformed or signature is missing/invalid

Following that, there’s an error regarding the Broadcom chip compatibility, suggesting that the system cannot properly recognize or work with the Broadcom chip (BCM57005/42):

[1220.888428] brcmfmac: brcmf_fw_alloc_request: Unknown chip BCM57005/42

Additionally, the system log mentions the loading of modules backported from a newer Linux kernel version to 4.9, which might be contributing to the issues:

[ 811.172285] Loading modules backported from Linux version v5.15.58-2023_1128-0-g4dfc3616ef88
[ 811.172289] Backport generated by backports.git v5.15.58-1-0-g42a95ce7

I’m hoping someone here might have encountered similar issues or could offer insights into resolving these complex problems. Any advice on troubleshooting steps, resources, or further actions would be incredibly appreciated.

Thank you very much for your time and assistance!

We don’t have experience with it, hope someone provide suggestions.

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